Correlated proton-proton pairs from the high-energy photodisintegration of light nuclei
Larson, Alan Virgil
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https://hdl.handle.net/2142/16634
Description
Title
Correlated proton-proton pairs from the high-energy photodisintegration of light nuclei
Author(s)
Larson, Alan Virgil
Issue Date
1961
Doctoral Committee Chair(s)
Smith, J.H.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
light nuclei
Language
en
Abstract
Targets of He, Li, C, and Al have been irradiated by bremsstrahlung of 257 Mev maximum photon energy. Photodisintegrations which involve two fast protons were observed. Energy and angular distributions of the coincident protons, one of which was always observed at a laboratory angle corresponding roughly to 90˚ in the center of mass of the two protons, were measured.
It is concluded that the primary absorption of the photon occurs on neutron-proton pairs. The proton-proton pairs arise from subsequent internal scattering of the primary photoneutron from other protons in the nucleus.
No evidence is seen that mesons are reabsorbed on nucleon pairs which do not included the parent nucleon. An upper limit is established for this process. This experiment supports the photomeson production models which do not depend upon the true absorption of mesons as they pass through nuclear matter.
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